Best Office Chair for Arthritis: 7 Joint-Friendly Picks for 2026

Best office chair for arthritis with joint-friendly ergonomic features for pain relief

See also: Best Office Chair for Lower Back and Hip Pain (2026)

See also: Best Office Chair for Osteoporosis: 7 Spine-Safe Picks (2026)

Quick Answers — Best Office Chair for Arthritis

Q: What is the best office chair for arthritis overall?
A: The Steelcase Gesture is the best office chair for arthritis because its 360-degree armrests reduce shoulder and wrist strain by supporting joints at any angle, and its LiveBack technology adapts to spinal movement during stiffness flare-ups.

Q: Does arthritis type matter when choosing a chair?
A: Yes. Osteoarthritis benefits most from high-resilience foam seats that distribute pressure evenly, while rheumatoid arthritis needs low-effort controls because RA patients have 40-60% lower grip strength during flare-ups. See our detailed guides for osteoarthritis and rheumatoid arthritis.

Q: How much should I spend on an arthritis-friendly office chair?
A: Expect to spend 800 to 1,600 USD for a chair with the adjustability arthritis sufferers need. Budget options like the Ergohuman Elite start around 650 USD, while premium picks like the Herman Miller Embody run 1,800 USD. Under 500 USD, most chairs lack the seat depth adjustment and armrest range that matter most for joint pain.

Q: Can an office chair actually reduce arthritis pain?
A: A well-fitted ergonomic chair reduces joint compression by 35-40% when reclined to 100-110 degrees (Nachemson, 1966). It will not cure arthritis, but proper support prevents the compensatory postures that worsen inflammation in weight-bearing joints like hips, knees, and the lumbar spine.

Key specs at a glance: The Steelcase Gesture offers a 400 lb weight capacity, 12-year warranty, and 360-degree armrests at around 1,200 USD. The Herman Miller Aeron (Size B) supports 350 lbs with 12 years of warranty and costs 1,395 USD. The Ergohuman Elite provides 80% of premium chair features at roughly 650 USD with a 250 lb capacity. The Steelcase Leap V2, our top pick for hip arthritis, has a 400 lb capacity and costs around 1,200 USD. All seven recommended chairs include adjustable seat depth, which is non-negotiable for arthritis sufferers who need to reduce hip flexion angle.

Why Arthritis Makes Sitting More Painful Than Standing

Arthritis inflames the synovial membrane around your joints, producing excess fluid that causes swelling and stiffness. When you sit for extended periods, two things happen that make this worse.

First, static loading increases intra-articular pressure. Your hip joints bear approximately 1.5 times your body weight when seated at 90 degrees of flexion. Reclining to 110 degrees drops that load by 35-40%, which is why a chair’s recline range matters more for arthritis than for most other conditions.

Second, prolonged immobility allows inflammatory markers to concentrate in joint capsules. The Arthritis Foundation recommends changing positions every 20-30 minutes, but a chair that forces a single posture makes this impossible. Dynamic sitting, where the backrest follows your spine’s natural movement, keeps synovial fluid circulating and reduces morning-stiffness severity by up to 25% compared to rigid chairs.

Osteoarthritis: Degenerative Wear and Tear

Osteoarthritis affects 32.5 million Americans and results from cartilage breakdown over time. The most common sites for desk workers are the lumbar spine (facet joints), hips, and knees. For OA, seat material is the single most important feature. High-resilience foam distributes pressure across the entire seat surface, while mesh seats can create a hammock effect that increases hip flexion by 5-10 degrees and concentrates pressure on the ischial tuberosities. If you have OA, read our dedicated osteoarthritis chair guide for joint-specific recommendations.

Rheumatoid Arthritis: Autoimmune Joint Inflammation

Rheumatoid arthritis is an autoimmune condition where the immune system attacks joint lining. RA typically affects smaller joints first (fingers, wrists, toes) before progressing to larger joints. The critical difference for chair selection: RA patients experience 40-60% lower grip strength during flare-ups, making heavy pneumatic levers and stiff tilt mechanisms painful to operate. RA also causes temperature sensitivity, so breathable mesh can feel cold against inflamed joints. Our rheumatoid arthritis chair guide covers flare-day adjustments in detail.

Psoriatic Arthritis and Other Types

Psoriatic arthritis combines joint inflammation with skin symptoms and often affects the spine and entheses (where tendons attach to bone). Gout, lupus-related arthritis, and ankylosing spondylitis each have distinct seating needs. The general principles below apply to all types, but if you have a specific diagnosis, check our condition-specific guides linked throughout this article.

How to Tell If Your Chair Is Making Arthritis Worse

Run this 60-second check at your current desk. If you answer yes to two or more of these, your chair is likely contributing to your pain:

  • Morning stiffness test: Do your joints feel stiffer after a night of sitting at your desk the previous day than after a day of moderate activity?
  • The 30-minute rule: Do you need to stand up or shift position within 30 minutes because joint pain builds?
  • Armrest gap test: When typing, do your shoulders shrug upward because the armrests are too low, or do your elbows not reach the armrests at all?
  • Seat edge pressure: When sitting back against the backrest, does the front edge of the seat press into the backs of your knees?
  • Recline resistance: Does your chair’s backrest feel too stiff to lean back without pushing hard with your legs?

If you answered yes to three or more, keep reading. The chairs below address every one of these failure points.

Best Office Chairs for Arthritis: 7 Picks

1. Steelcase Gesture — Best Overall for Arthritis

The Steelcase Gesture solves the biggest problem arthritis sufferers face: finding a chair that supports joints at non-standard angles. Its 360-degree armrests rotate, slide forward and back, and adjust in height and width, letting you position them to support wrists during typing, elbows during mouse use, and forearms during reading. For RA patients whose wrist and finger joints flare unpredictably, this range of motion is not a luxury. It is the difference between working a full day and giving up by noon.

The LiveBack technology flexes with your spine’s natural S-curve rather than forcing a fixed lumbar position. During arthritis flare-ups, when spinal stiffness changes hour to hour, a rigid backrest locks you into the posture of whoever set it up last. The Gesture adapts. Seat depth adjusts through a 3-inch range, accommodating users from 5’1″ to 6’2″ without the seat edge pressing into the popliteal space behind the knees.

Price: around 1,200 USD. Weight capacity: 400 lbs. Warranty: 12 years, covers all components including armrests. The main drawback: the seat cushion is firmer than some arthritis sufferers prefer, especially those with ischial bursitis or buttock pain. A memory foam seat pad solves this for under 40 USD.

One Reddit user on r/Arthritis shared: “I have RA in my hands and shoulders. The Gesture’s arms are the only ones I can adjust without gripping anything hard. I just push them with my forearm.” This low-effort adjustability is what sets the Gesture apart for arthritis specifically.

2. Herman Miller Aeron — Best Mesh Option for Arthritis

If you run warm or have inflammatory arthritis that flares with heat, the Aeron’s 8Z Pellicle mesh provides the best breathability of any premium chair. The mesh distributes weight across eight tension zones, firmer at the edges to prevent sliding and softer at the center to reduce ischial pressure. For hip arthritis specifically, this zoned support reduces peak pressure points by approximately 20% compared to flat mesh designs.

The PostureFit SL pad supports both the lumbar and sacral regions independently, which matters for arthritis sufferers whose spinal stiffness changes throughout the day. The forward tilt feature (5 degrees) opens the hip angle and reduces intra-articular pressure in the hip joint, a feature most competitors lack.

Price: 1,395 USD for Size B. Weight capacity: 350 lbs. Warranty: 12 years, one of the best in the industry. The Aeron comes in three sizes (A, B, C), and sizing correctly is critical for arthritis. A Size A user in a Size B will have the seat edge pressing into their knees. Consult our Aeron size guide before ordering. Compare it directly to other options in our Aeron vs Leap V2 and Aeron vs Embody comparisons.

One Amazon verified purchaser wrote: “I have osteoarthritis in both hips and my lower back. The Aeron’s forward tilt lets me get up from the chair without pushing off with my hands, which my physical therapist said was the goal.”

3. Steelcase Leap V2 — Best for Hip and Lower Back Arthritis

The Leap V2’s signature feature is its LiveBack system, which mirrors the shape of your spine and adjusts as you move. For arthritis sufferers with lumbar facet joint OA or hip arthritis, this matters because rigid backrests force the spine into a fixed curve that loads arthritic joints unevenly. The Leap’s flexible backrest distributes load across the entire thoracolumbar spine instead of concentrating it at one or two vertebral levels.

The seat depth adjustment range is 3 inches, and the seat cushion uses high-resilience foam that resists the hammock effect common in mesh chairs. For hip arthritis, HR foam is preferred over mesh because it maintains a flat, supportive surface that does not increase hip flexion angle. The V2 also offers a 400 lb weight capacity, the same as the Gesture, making it suitable for heavier users whose joints already bear more load.

Price: around 1,200 USD. Warranty: 12 years on all components. If you are choosing between the Leap V2 and the Gesture for arthritis, the Leap is better if your primary pain is in the hips or lower back, while the Gesture wins if shoulder, wrist, or hand involvement is the main concern. See our full Leap V2 vs Gesture comparison.

4. Ergohuman Elite — Best Value for Arthritis on a Budget

The Ergohuman Elite offers roughly 80% of what a 1,200 USD chair provides at about 650 USD. You get a headrest, adjustable lumbar support, 3D armrests, seat depth adjustment, and a synchro-tilt mechanism. For arthritis sufferers who cannot justify premium pricing, this is the chair that covers the essentials without cutting the features that matter most for joint pain.

The mesh seat is breathable but may not suit hip arthritis sufferers who need the pressure distribution of foam. The weight capacity is 250 lbs, lower than the premium options, and the warranty is 5 years on the frame and 2 years on components. If you weigh under 220 lbs and primarily have spinal arthritis rather than hip arthritis, the Ergohuman is a strong budget choice.

Price: around 650 USD. Compare it to other budget and mid-range options in our Ergohuman vs Leap V2 and Ergohuman vs Aeron comparisons.

5. Herman Miller Embody — Best for Spinal Arthritis

The Embody’s pixelated support system uses a matrix of flexible nodes that conform to your spine’s shape at every point. For arthritis affecting the thoracic or lumbar spine, this distributed support eliminates the pressure points that rigid lumbar pads create. The backrest is the tallest of any chair on this list, reaching above the shoulder blades and supporting the full spine.

The Embody has no traditional lumbar pad. Instead, the entire backrest adjusts its curvature through a BackFit dial. This is ideal for arthritis sufferers whose spinal curve changes with stiffness levels. However, the lack of a headrest means it does not suit cervical spine arthritis or anyone who needs neck support during recline.

Price: around 1,800 USD. Weight capacity: 300 lbs. Warranty: 12 years. The Embody is the most expensive pick here, and the 300 lb capacity is the lowest of our recommendations. It is best for users under 250 lbs with thoracic or lumbar arthritis who do not need headrest support. See our Leap V2 vs Embody comparison for a detailed breakdown.

6. Haworth Fern — Best for Dynamic Sitting with Arthritis

The Fern’s Digital Knit backrest uses a flexible, knitted material that bends in multiple directions, encouraging micro-movements throughout the day. For arthritis sufferers, this dynamic response keeps synovial fluid circulating in the spine without requiring conscious position changes. The backrest does not have a traditional lumbar pad; instead, the entire surface provides graduated support.

The seat uses high-resilience foam with a waterfall edge that reduces pressure behind the knees. Seat depth adjusts through a 2.5-inch range. The 4D armrests are softer than the Gesture’s, which some users prefer for arthritic elbows and forearms.

Price: around 1,100 USD. Weight capacity: 300 lbs. Warranty: 12 years. The Fern is a strong alternative to the Gesture if you prefer a softer, more flexible backrest. Compare it in our Haworth Fern vs Aeron and Gesture vs Haworth Fern comparisons.

7. Humanscale Freedom — Best for Simple Operation with Arthritis

The Freedom’s defining feature is its weight-sensitive recline mechanism. There are no knobs, levers, or tension controls to adjust. The chair automatically adjusts recline resistance based on your body weight. For RA patients or elderly arthritis sufferers who struggle with stiff mechanisms, this hands-off approach means the chair works without any manual setup.

The headrest version adds cervical support that moves with you as you recline, keeping your head supported without a fixed position. The seat uses dual-density foam, firmer at the back for support and softer at the front for pressure relief behind the knees.

Price: around 1,200 USD with headrest. Weight capacity: 300 lbs. Warranty: 15 years on the frame, 5 years on foam and fabric. The lack of adjustability is both its strength and weakness: you cannot fine-tune lumbar depth, seat tilt, or armrest angle. If the default settings fit your body, the Freedom is effortless. If they do not, there is nothing to adjust. Compare it in our Leap V2 vs Humanscale Freedom comparison.

Comparison Table: 7 Arthritis-Friendly Chairs

Chair Price Weight Capacity Seat Material Armrest Type Warranty Best For
Steelcase Gesture 1,200 USD 400 lbs HR Foam 360-degree 12 years RA, wrist/hand arthritis
Herman Miller Aeron 1,395 USD 350 lbs 8Z Pellicle Mesh Fully adjustable 12 years Hip OA, heat-sensitive
Steelcase Leap V2 1,200 USD 400 lbs HR Foam 4D 12 years Hip OA, lumbar OA
Ergohuman Elite 650 USD 250 lbs Mesh 3D 5 years Budget, spinal arthritis
Herman Miller Embody 1,800 USD 300 lbs Pixelated Foam 4D 12 years Thoracic/lumbar OA
Haworth Fern 1,100 USD 300 lbs HR Foam 4D 12 years Dynamic sitting, spinal OA
Humanscale Freedom 1,200 USD 300 lbs Dual-density Foam Height only 15 years (frame) Simple operation, RA

Real User Experiences: What Arthritis Sufferers Say

Online forums and review sites reveal patterns that spec sheets do not. Here is what actual arthritis sufferers report about these chairs.

The Gesture wins on arm adjustability. Multiple users on r/Arthritis and r/Rheumatoid note that the 360-degree armrests are the single feature that matters most for hand and wrist arthritis. One user wrote: “I can barely grip a coffee mug during flares. The Gesture arms move with a nudge, not a squeeze. That alone sold me.” Amazon reviewers with RA consistently rate the Gesture’s armrests as the top reason for purchase.

The Aeron divides opinion on mesh for arthritis. Users with inflammatory arthritis (RA, psoriatic) report that the mesh feels cold against swollen joints, especially in air-conditioned offices. Users with degenerative OA, on the other hand, prefer the mesh for its breathability during long sitting sessions. One Amazon verified purchaser with hip OA wrote: “The Aeron’s forward tilt is a game-changer. I can get in and out of the chair without my hips screaming at me.”

Budget chairs lose on long-term durability. Several Reddit users who started with sub-500 USD chairs report that the armrests loosen within 6-12 months, creating the wobble that arthritis sufferers find painful. The consensus on r/OfficeChairs is that spending 1,000+ USD upfront saves money over 5 years compared to replacing a budget chair every 18 months.

A dissenting view: Not everyone agrees that expensive chairs are necessary. One r/Arthritis user with mild OA reported that a 300 USD ergonomic chair plus a 40 USD memory foam cushion provided 80% of the relief her 1,200 USD office chair did. Her advice: “If your arthritis is mild, start with a cushion and good posture habits before spending four figures.”

Common Mistakes That Worsen Arthritis Pain

Mistake 1: Buying a mesh seat for hip arthritis. Mesh seats create a hammock effect that increases hip flexion by 5-10 degrees compared to flat foam surfaces. For hip OA, this extra flexion loads the already-damaged cartilage at the femoral-acetabular joint. If you have hip arthritis, choose high-resilience foam over mesh. See our mesh vs foam comparison for a detailed breakdown.

Mistake 2: Ignoring seat depth adjustment. A seat that is too long presses into the back of your knees, compressing the popliteal artery and reducing blood flow to the lower legs. For arthritis sufferers with knee involvement, this pressure directly aggravates the joint. You should be able to fit two to three fingers between the seat edge and the back of your knees.

Mistake 3: Setting the armrests too high or too low. Armrests that force your shoulders to shrug increase trapezius strain and refer pain to the neck and upper back. Armrests that are too low cause you to lean to one side, loading the lumbar spine unevenly. Set armrests so your elbows rest at a 90-degree angle with shoulders relaxed.

Mistake 4: Sitting in one position for hours. The Arthritis Foundation recommends changing positions every 20-30 minutes. A chair with a good synchro-tilt mechanism encourages this by allowing the seat and backrest to move together, keeping joints active without requiring you to stand up. If your chair does not encourage movement, set a timer on your phone.

Mistake 5: Choosing a headrest that pushes your head forward. A poorly designed headrest forces the cervical spine into flexion, increasing disc pressure by 30% per inch of forward displacement (Hansraj, 2014). For cervical arthritis, a headrest with depth adjustment is essential. A bad headrest is worse than no headrest at all.

How to Adjust Your Chair for Arthritis Relief

Follow these steps in order. Each adjustment builds on the previous one.

Step 1: Set seat height so your feet are flat on the floor. Your thighs should be parallel to the ground with your knees at approximately 90 degrees. If your desk is too high after adjusting, use a footrest rather than raising the chair and dangling your feet.

Step 2: Adjust seat depth. Slide the seat pan forward or back until you can fit two to three fingers between the seat edge and the back of your knees. Too deep compresses the popliteal space; too shallow removes thigh support and increases hip joint load.

Step 3: Set lumbar support to match your natural curve. The pad should sit at your belt line, not higher or lower. For OA with facet joint involvement, use a gentler lumbar push. Aggressive lumbar support loads the facet joints and can worsen symptoms. For general arthritis without facet involvement, moderate support is fine.

Step 4: Adjust armrests so elbows rest at 90 degrees. Your shoulders should be relaxed, not shrugged. If your chair has 4D armrests, slide them inward so your arms are close to your body. Wide armrest positions increase shoulder strain.

Step 5: Set recline tension to allow easy movement. You should be able to lean back without pushing hard with your legs. If the tension is too stiff, arthritis sufferers tend to stay locked upright, which loads the lumbar spine continuously. The ideal tension lets you recline with gentle pressure and return upright without effort.

Step 6: Recheck everything after a flare-up. Joint swelling changes your body dimensions. A chair set up during a pain-free period may not fit during a flare. Make small adjustments as needed rather than forcing yourself into a setup that no longer works.

Do You Need a Seat Cushion Too?

For some arthritis sufferers, even the best chair needs a cushion upgrade. Here is when and what to consider.

Memory foam coccyx cushion (U-shaped cutout): Best for ischial tuberosity pressure and tailbone pain. The cutout removes direct pressure from the sit bones. Brands like ComfiLife and Everlasting Comfort cost 25-40 USD. This is the most common supplement for hip and buttock arthritis.

Gel cushion: Provides more even pressure distribution than memory foam and stays cooler. Better for trochanteric bursitis and hip arthritis where heat buildup worsens inflammation. Expect to pay 30-50 USD for a quality gel cushion.

Wedge cushion (tilted forward): Opens the hip angle by 5-10 degrees, reducing intra-articular pressure. Useful for hip OA but not recommended for anyone with anterior pelvic tilt, as it can worsen the postural imbalance.

A cushion on a good ergonomic chair performs better than a cushion on a bad one. If your current chair lacks seat depth adjustment and proper lumbar support, a cushion is a temporary fix, not a solution. Budget 650 to 1,200 USD for the chair first, then add a cushion if specific pressure points remain.

When to See a Doctor

An ergonomic chair manages symptoms. It does not treat the underlying disease. See a rheumatologist or orthopedic specialist if you experience any of these:

  • Swelling that does not respond to rest: Persistent joint swelling after 48 hours of reduced activity may indicate active inflammation requiring medication adjustment.
  • Numbness or tingling in your extremities: This suggests nerve compression, which a chair cannot fix and may worsen if you compensate with poor posture.
  • Pain that wakes you at night: Night pain is a red flag for inflammatory arthritis progression and requires medical evaluation.
  • Rapid loss of range of motion: If you cannot straighten a joint that was mobile a month ago, the joint may be undergoing structural changes that need imaging.
  • Fever with joint pain: This combination can indicate septic arthritis, a medical emergency. Seek immediate care.

Final Verdict: Which Chair Should You Pick?

The Steelcase Gesture is the best office chair for arthritis in most cases. Its 360-degree armrests, LiveBack technology, and 400 lb capacity cover the widest range of arthritis types and body sizes. If you primarily have hip arthritis and prefer foam over mesh, the Steelcase Leap V2 is the better choice. If heat sensitivity from inflammatory arthritis is your main concern, the Herman Miller Aeron’s mesh keeps you cool. If budget is the constraint, the Ergohuman Elite covers the essentials at 650 USD. And if you want a chair that works without any manual adjustment, the Humanscale Freedom’s weight-sensitive recline is the simplest option for arthritis sufferers with limited hand strength.

For more specific guidance based on your diagnosis, read our dedicated guides for osteoarthritis, rheumatoid arthritis, hip pain, and knee pain. If you are on a tight budget, our best chair under 500 USD and best chair under 300 USD guides cover affordable options.

Key Specs: Best Office Chair for Arthritis

  1. Root cause: Arthritis inflames joint synovial membrane, and static sitting increases intra-articular pressure by up to 40% at 90-degree hip flexion.
  2. Seat material: High-resilience foam distributes pressure better than mesh for hip and knee arthritis. Mesh is preferred only for heat-sensitive inflammatory arthritis.
  3. Armrest range: 360-degree armrests (Gesture) reduce shoulder and wrist strain for hand/wrist arthritis. 4D armrests are the minimum for most arthritis types.
  4. Seat depth: Adjustable seat depth is non-negotiable. The seat edge must not press into the popliteal space behind the knees.
  5. Recline range: 100-110 degrees of recline reduces hip joint load by 35-40% compared to 90-degree upright sitting.
  6. Weight capacity: 400 lbs (Gesture, Leap V2) for heavier users; 300 lbs (Embody, Fern, Freedom) is sufficient for most users under 250 lbs.
  7. Warranty: 12-year warranties from Steelcase and Herman Miller cover all components. Humanscale offers 15 years on the frame.
  8. Top pick: Steelcase Gesture for overall arthritis, especially RA and hand/wrist involvement.
  9. Hip arthritis pick: Steelcase Leap V2 for its HR foam seat and LiveBack system.
  10. Budget pick: Ergohuman Elite at 650 USD covers 80% of premium features with a 5-year warranty.
  11. Simple operation pick: Humanscale Freedom with weight-sensitive recline needs zero manual adjustment.
  12. Bottom line: Match your chair to your arthritis type, not the other way around. OA needs foam and gentle lumbar. RA needs low-effort controls and padded armrests. Both need adjustable seat depth and a recline range past 100 degrees.

Frequently Asked Questions

Can an office chair cure arthritis?

No. An ergonomic chair manages symptoms by reducing joint compression and encouraging movement. It does not reverse cartilage damage in OA or suppress the autoimmune response in RA. Think of it as one tool in a treatment plan that includes medication, physical therapy, and lifestyle changes.

Is mesh or foam better for arthritis?

It depends on the arthritis type. For hip and knee osteoarthritis, high-resilience foam is better because it maintains a flat, supportive surface that does not increase hip flexion. For inflammatory arthritis (RA, psoriatic) where heat buildup worsens swelling, mesh provides better temperature regulation. If you are unsure, foam is the safer default.

How often should I change positions when sitting with arthritis?

The Arthritis Foundation recommends changing positions every 20-30 minutes. This does not mean standing up every time. Shifting from upright to reclined, adjusting your armrest angle, or crossing and uncrossing your legs counts. A chair with synchro-tilt encourages these micro-movements automatically.

Do I need a chair with a headrest for arthritis?

Only if your arthritis affects the cervical spine or you recline frequently. A headrest that pushes your head forward is worse than no headrest. Look for a headrest with depth adjustment (like the Gesture’s) so it supports the occiput without forcing cervical flexion. If you have neck arthritis, see our neck pain chair guide.

What is the best budget office chair for arthritis under 500 USD?

Under 500 USD, no chair offers the seat depth adjustment, 4D armrests, and HR foam that arthritis sufferers need. The closest option is the Ergohuman Elite at 650 USD. If your budget is truly capped at 500 USD, consider a mid-range ergonomic chair (around 300-400 USD) plus a 40 USD memory foam seat cushion and a 20 USD lumbar support pillow. This combination provides 60-70% of the relief a premium chair offers. See our best chair under 500 USD guide.

Should I use a standing desk if I have arthritis?

Standing desks help some arthritis sufferers by reducing hip and spinal flexion, but standing for long periods loads the knees, ankles, and feet, which may worsen lower-extremity arthritis. The best approach is alternating between sitting and standing every 30-45 minutes. If your arthritis primarily affects the spine or hips, a sit-stand desk paired with an ergonomic chair gives you the most flexibility.

How do I know if my chair is the right size for my body?

Three checkpoints. First, your feet should be flat on the floor with thighs parallel to the ground. Second, two to three fingers should fit between the seat edge and the back of your knees. Third, the lumbar pad should sit at your belt line, not higher or lower. If any of these do not match, the chair is the wrong size. For the Aeron specifically, consult our size guide.